tetration 0.1.9

Chunked tensor .tet format, tet CLI, and optional C ABI (tetration-ffi)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

//! Dense embedder materialize API (`materialize_query_selection`, `materialize_query_transform_ram`).

use super::fixture::write_multichunk_2x3_tiles;
use crate::layout::mmap_file_read;
use crate::query::{
    DenseBuffer, materialize_query_selection, materialize_query_transform_ram, parse_query_json,
    plan_query_with_tet_mmap, plan_read_for_document, validate_query,
};

fn pop_std_1_to_6() -> f64 {
    let mean = 3.5;
    let var = (1..=6)
        .map(|n| {
            let d = f64::from(n) - mean;
            d * d
        })
        .sum::<f64>()
        / 6.0;
    var.sqrt()
}

#[test]
fn materialize_query_selection_f32_full_tensor() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("dense.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(r#"{"dataset":"a"}"#).unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let out = materialize_query_selection(&doc, &mmap).unwrap();
    assert_eq!(out.shape, vec![2, 3]);
    match out.buffer {
        DenseBuffer::F32(vals) => {
            assert_eq!(vals.len(), 6);
            let want = [1.0_f32, 2.0, 3.0, 4.0, 5.0, 6.0];
            for (got, expected) in vals.iter().zip(want) {
                assert!((got - expected).abs() < 1e-5, "got {got}, want {expected}");
            }
        }
        other => panic!("expected f32 buffer, got {other:?}"),
    }
}

#[test]
fn materialize_query_selection_honors_slice() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("slice.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(
        r#"{"dataset":"a","selection":[{"start":0,"stop":1},{"start":0,"stop":3}]}"#,
    )
    .unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let out = materialize_query_selection(&doc, &mmap).unwrap();
    assert_eq!(out.shape, vec![1, 3]);
    match out.buffer {
        DenseBuffer::F32(vals) => assert_eq!(vals, vec![1.0, 2.0, 3.0]),
        other => panic!("expected f32 buffer, got {other:?}"),
    }
}

#[test]
fn materialize_query_selection_rejects_operation() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("op.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(r#"{"dataset":"a","mean":[]}"#).unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let err = materialize_query_selection(&doc, &mmap).unwrap_err();
    assert!(err.to_string().contains("selection-only"), "{err}");
}

#[test]
fn plan_read_for_document_matches_query_read_plan() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("plan.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(
        r#"{"dataset":"a","selection":[{"start":0,"stop":1},{"start":0,"stop":3}]}"#,
    )
    .unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let planned = plan_read_for_document(&doc, &mmap).unwrap();
    let response = plan_query_with_tet_mmap(&doc, None, &mmap, None).unwrap();
    let rp = response.read_plan.as_ref().unwrap();
    assert_eq!(
        planned.read_plan.logical_selection_shape,
        rp.logical_selection_shape
    );
    assert_eq!(planned.read_plan.chunk_count, rp.chunk_count);
    assert_eq!(planned.read_plan.chunks.len(), rp.chunks.len());
}

#[test]
fn materialize_query_transform_ram_zscore_full_buffer() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("zscore.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(r#"{"dataset":"a","transform":{"method":"zscore"},"write":"ram"}"#)
        .unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let out = materialize_query_transform_ram(&doc, &mmap, &path, None).unwrap();
    assert_eq!(out.shape, vec![2, 3]);
    let std = pop_std_1_to_6();
    match out.buffer {
        DenseBuffer::F32(vals) => {
            assert_eq!(vals.len(), 6);
            for (i, &v) in vals.iter().enumerate() {
                let raw = f64::from((i + 1) as f32);
                let expected = ((raw - 3.5) / std) as f32;
                assert!(
                    (v - expected).abs() < 1e-4,
                    "index {i}: got {v}, expected {expected}"
                );
            }
        }
        other => panic!("expected f32 buffer, got {other:?}"),
    }
}

#[test]
fn materialize_query_transform_ram_rejects_sidecar_write() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("sidecar.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(
        r#"{"dataset":"a","transform":{"method":"zscore"},"write":{"target":"sidecar","timestamp":false}}"#,
    )
    .unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let err = materialize_query_transform_ram(&doc, &mmap, &path, None).unwrap_err();
    assert!(err.to_string().contains("ram"), "{err}");
}

#[test]
fn materialize_query_transform_ram_requires_transform_operation() {
    let dir = tempfile::tempdir().unwrap();
    let path = dir.path().join("plain.tet");
    write_multichunk_2x3_tiles(&path, "a");
    let doc = parse_query_json(r#"{"dataset":"a"}"#).unwrap();
    validate_query(&doc).unwrap();
    let mmap = mmap_file_read(&path).unwrap();
    let err = materialize_query_transform_ram(&doc, &mmap, &path, None).unwrap_err();
    assert!(err.to_string().contains("transform"), "{err}");
}